METEOROLOGY | Altimetry (QFE, QNH, QNE)

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  • เผยแพร่เมื่อ 18 ม.ค. 2025

ความคิดเห็น • 86

  • @VASAviation
    @VASAviation  4 ปีที่แล้ว +9

    New lapel mic has just arrived so audio quality will be better for videos recorded from now on (hopefully). Thanks to those who gave that advice.
    -- Previous Lesson Video: th-cam.com/video/XAs5Bkob4n4/w-d-xo.html

  • @DB-thats-me
    @DB-thats-me 4 ปีที่แล้ว +44

    Q nh =. Nautical Height
    Q fe = Fieid Elevation
    Q ne = Nautical Estimate or En Route
    FYI 👍

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Good mnemonics!

    • @Ukvideoclips
      @Ukvideoclips 3 ปีที่แล้ว

      That really helps. Nice one.

  • @phillee2814
    @phillee2814 4 ปีที่แล้ว +15

    I always remembered them as FE = Field Elevation, NH = Nautical Height,, NE = Normalised Everywhere.
    If that helps anyone else remember them, you're welcome.
    After that and 27ft/hPa, it is just arithmetic and correct visualisation of the isobars in relation to each other. I'm lucky in that respect, as the product of a Chartered Civil Engineer and a Mathematics Teacher!
    Also, when looking at a low-level chart, raised obstructions have the altitude marked first, then the height in brackets.
    The first figure is what your altimeter will be reading if you hit the top of the obstruction, the second is the distance you will fall afterwards.

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว +5

      Thanks for your comment, Phil. I'm sure your mnemonic will be helpful for someone out there

    • @jamesalex5034
      @jamesalex5034 ปีที่แล้ว

      works for me
      @@VASAviation

  • @吉田幸宏-v7e
    @吉田幸宏-v7e 4 ปีที่แล้ว +2

    Greeting from Japan ! I watch Japanese TH-camr who focuses on ATC, so your movie helps me to understand in multiple language :)

  • @sayeedafridi9747
    @sayeedafridi9747 ปีที่แล้ว

    You're such a blessing ! You're one of my most fav TH-cam channels out there and I really appreciate all the time you take to make these videos. Ik it's old but feel like stumbled on gold haha

  • @Sergej_hmn
    @Sergej_hmn 4 ปีที่แล้ว +2

    This is the best explanation about this topic I ever saw. Thank you!

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Glad it was helpful!

    • @Dohamoud
      @Dohamoud ปีที่แล้ว

      I totally agree with you, now I don't have to bet with answers cause I clearly know how they are calculated!!!

  • @LaggerYT1337
    @LaggerYT1337 4 ปีที่แล้ว +1

    Thank you for doing this. I think I understood altimeters a lot better than from other explanations I've seen now. Good job! :)

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว +2

      Great to hear! Thanks for watching!

  • @karld17
    @karld17 5 หลายเดือนก่อน

    not gonna lie that was fun, and he is a good teacher, i'll surely be watching more of his :)

  • @JohnWick-bb9jl
    @JohnWick-bb9jl 4 ปีที่แล้ว +1

    Math problem at 17:57, plane is set to 1013.2 qnh, but the plane lands somewhere where its 1023 qnh. The messed up altimeter setting is now 270 feet off (negative). Airport is at 290, so the (now incorrect) altimeter will say 20. It took me like an hour to wrap my head around it.

    • @bogdan_n
      @bogdan_n 4 ปีที่แล้ว +1

      Setting the QNH practically means setting the reference, or the 0 point of the altimeter scale. Pressure drops as the altitude increases, so, setting a lower QNH than the actual, means setting the 0 point higher than it should be, so the plane will be higher than what's indicated on the altimeter.

  • @terencewright2223
    @terencewright2223 5 หลายเดือนก่อน

    Excellent video.

  • @Longbyname
    @Longbyname 4 ปีที่แล้ว +1

    This is massively helpful. Thank you.

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      So glad it is!

    • @Longbyname
      @Longbyname 4 ปีที่แล้ว +1

      Please keep making these videos on these valuable subjects. They’re massively overlooked for those, like myself and other future flyers need to know.

  • @benorex8980
    @benorex8980 4 ปีที่แล้ว +1

    Very well done! I’m a student pilot and I’m gonna take the theory exams in a few months, so every bit of practice i get is useful. Thanks mate 👍

  • @MrPouHan
    @MrPouHan ปีที่แล้ว

    Well done - thank you.

  • @prateeksaxena8980
    @prateeksaxena8980 2 ปีที่แล้ว

    Very well explained. Thank you.

  • @stamatisk6432
    @stamatisk6432 4 ปีที่แล้ว +6

    Keep it up please!!

  • @suvendu8967
    @suvendu8967 3 ปีที่แล้ว

    Great vedio, thank you sir for that

  • @euredyka00
    @euredyka00 4 ปีที่แล้ว +1

    Maaan.. better than aviation school, keep posting more instructional :)

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว +1

      Definitely will if you like this :)

  • @jennscott6858
    @jennscott6858 4 ปีที่แล้ว

    This made sense! Thank you for posting!

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Glad it was helpful!

  • @angadbrar8102
    @angadbrar8102 3 ปีที่แล้ว

    Great video, thank you. 👍

  • @Teachers1333
    @Teachers1333 3 ปีที่แล้ว

    Sir. Its very. Simple explanation
    Really useful
    Thank you so much
    Iam from India. Iam a cpl trainee

  • @PilotFun101
    @PilotFun101 4 ปีที่แล้ว

    Thanks for the video. Great job!

  • @bataradharma3994
    @bataradharma3994 4 ปีที่แล้ว

    Yes. I need it. Thx!!

  • @luisvalencia9936
    @luisvalencia9936 4 ปีที่แล้ว

    excelent video, thank you very much

  • @Copeium1
    @Copeium1 4 ปีที่แล้ว +2

    My only complaint is the lighting on the board. Other than that. Great content as usual!

    • @jayschafer1760
      @jayschafer1760 4 ปีที่แล้ว

      Agreed. I don't film videos, and I know lighting can be a little hard to get right, but lessons filmed in shadows are tough to watch, and I'm sure there are plenty of resources out there.

  • @IorekByrnison086
    @IorekByrnison086 4 ปีที่แล้ว

    Great information! Very interesting... Thank you for this video, keep it up...

  • @transmaster
    @transmaster 4 ปีที่แล้ว +2

    Q code’s are still used in Amateur radio, mostly CW. I would like to know about the WW2 “R” codes that were used in the UK by the Bomber squadrons.

  • @Ahmed-nb1zw
    @Ahmed-nb1zw 3 ปีที่แล้ว

    Very informative, thank you:)

  • @Mash4096
    @Mash4096 4 ปีที่แล้ว +1

    Very good explanation! This subject is hard to understand for many people.

    • @Lagrange1970
      @Lagrange1970 ปีที่แล้ว

      Agree, job well do me here. Many thanks for that

  • @jakublewandowski9081
    @jakublewandowski9081 4 ปีที่แล้ว

    thanks for the vid, hope you have a nice day ;)

  • @ozcantas7994
    @ozcantas7994 4 ปีที่แล้ว

    Thanks mate ! Great content.

  • @nerysghemor5781
    @nerysghemor5781 4 ปีที่แล้ว +5

    Funny, I had been wondering how altitude was really determined given the differences in terrain. Not a pilot but raised by one, so I think about this kind of stuff!!! XD

  • @manueladao8653
    @manueladao8653 ปีที่แล้ว

    Good. Just a question. Is the formula QNH=QFE+Alt(feets)/28.5 Correct?

  • @osvaldo17924
    @osvaldo17924 4 ปีที่แล้ว

    Do you have Aeroméxico AM549 aborted take off comms?

  • @russv4753
    @russv4753 4 ปีที่แล้ว

    Could you go over the proper steps to clear a power surge in the engine/engines?

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      We'll see some of the powerplant topics

  • @CAQNUZGHIR
    @CAQNUZGHIR 3 ปีที่แล้ว

    I'm confused from which altitude i have to calculate the temperature correction error. can you please help me

  • @dennisharrington6055
    @dennisharrington6055 4 ปีที่แล้ว

    Thanks. We mixing metric with Imperial? We missed Mars doing that...

  • @oscarb9139
    @oscarb9139 4 ปีที่แล้ว

    Dear VAS, some of my comments are missing from another of your video comment section. Do you ever delete comments? If so, did you delete mine? There was no objectionable language or ethnic content in them. I am curious.

  • @Die4dutch2
    @Die4dutch2 4 ปีที่แล้ว

    ahhhh so thankful i passed my atpl exams and dont have to worry about calculating them and practising them everyday xd

    • @MichaelJohnson-fd5cx
      @MichaelJohnson-fd5cx 4 ปีที่แล้ว

      How were they? I'm focusing on finishing my MEI and then on that.

    • @Die4dutch2
      @Die4dutch2 4 ปีที่แล้ว

      @@MichaelJohnson-fd5cx Really depends on the subject, the CAA and if you have self study or follow classes. Some subjects are really do-able and others are very hard.
      Tbh, as long as you put the work and hours in to study, You should be fine! I didn’t in the start and made it a lot harder for myself then was needed. I did self study at first but changed to following classes as that motivates me more and I’m just not the type of person to self study.
      Also, if you’re from the uk, consider taking your atpl with a different authority/CAA. I changed from uk CAA to Austrian CAA and the exams were a little easier. Austria is also a lot more lenient. But I’m speaking of 9 months ago when I finished so a lot could’ve changed.

  • @coconut7872
    @coconut7872 4 ปีที่แล้ว

    Can you please do a gnav lesson on quj,qte,...

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว +2

      that's on the list :)

  • @ralfbaechle
    @ralfbaechle 4 ปีที่แล้ว

    You like many, many other sources are explaining it as if QNE was only used above the transitiion altitude which isn't strictly true. QNE can be useful when the airpressure is outside the value that can be set on the subscale of the altimetere. I've also seen it being used in the handout for pilots of a gliding competition - not sure why, the weather there certainly wasn't extreme, I was wondering there are altimeters that can' tbe adjusted at all? Or the button has fallen off ;-)
    Various sources alternate between describing QNE as the standard pressure of 1013.25hPa or the altitude indicated when the altimeter is set to that standard pressure of 1013.25hPa. This is what Skybrary says: "QNE is different to the other altimetry Q codes in that it is an altitude not a pressure (although it is commonly incorrectly described as such)." I take Skybrary is as close to authoritative as it gets, so this is how I'm using the term QNE.

  • @flankerskioneniner4290
    @flankerskioneniner4290 4 ปีที่แล้ว

    Thanks, long duration but actually.. simple 👍
    For the last question, i just subtract 1.023-1.013 = 10 hPa because i still remember that the last 2 digits behind the decimal are the significant figures rules in physics.
    Can i use that ?

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Affirm, it's just the difference between both pressures.

    • @flankerskioneniner4290
      @flankerskioneniner4290 4 ปีที่แล้ว

      @@VASAviation roger that.. thanks for the knowlegde sir 👍

  • @RJ-yn2dj
    @RJ-yn2dj 2 ปีที่แล้ว

    where is p2?

  • @stamatisk6432
    @stamatisk6432 4 ปีที่แล้ว

    What if we are on sea level and set QFE while the airfield is actually above us?

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Altimeter would read negative values

    • @stamatisk6432
      @stamatisk6432 4 ปีที่แล้ว

      @@VASAviation I thought ab that but I wasn't sure. Thanks VASA

    • @ZsomborZsombibi
      @ZsomborZsombibi 4 ปีที่แล้ว +2

      You'll hear "climb, climb now".

    • @chrisschack9716
      @chrisschack9716 4 ปีที่แล้ว +1

      Same thing would happen at some fields below sea level when you set QNH

  • @yvan9234
    @yvan9234 4 ปีที่แล้ว +1

    Please, buy a better mic. Otherwise thanks for the video, your explanations are amazing

  • @williamf.2934
    @williamf.2934 3 ปีที่แล้ว

    But when is QFE used instead of QNH? I just don't get it imma bang my head into the damn wall

  • @fabior6025
    @fabior6025 4 ปีที่แล้ว

    Saw your handle in some of the avexam comments 😂

  • @mojo7618
    @mojo7618 ปีที่แล้ว

    Wonderful video, where are you from ?

  • @julianharari6273
    @julianharari6273 4 ปีที่แล้ว +2

    how did i get here so early lol

    • @julianharari6273
      @julianharari6273 4 ปีที่แล้ว

      Thank you for the video! I'm starting to learn about climatology so i think I'll need this in the future 😅

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Thank you for watching!

  • @mohammedfarqad5399
    @mohammedfarqad5399 4 ปีที่แล้ว +1

    Hi from Iraq 🇮🇶

  • @missaisohee
    @missaisohee 4 ปีที่แล้ว

    Saw a line of toilet seats on my feed before i saw it was VASAaviation and i was like.. oops. Those were planes.

  • @MorrisonGrover-s3h
    @MorrisonGrover-s3h 4 หลายเดือนก่อน

    Robinson Richard Jones Christopher Williams Sharon

  • @LeopoldCyril-v5p
    @LeopoldCyril-v5p 3 หลายเดือนก่อน

    Miller Dorothy Perez Joseph Thompson Timothy

  • @larryscott3982
    @larryscott3982 4 ปีที่แล้ว +1

    Plz, get a better mic.

    • @VASAviation
      @VASAviation  4 ปีที่แล้ว

      Lapel mic just arrived

    • @Lagrange1970
      @Lagrange1970 ปีที่แล้ว

      Honestly that not a big deal for me personally . The value of the content was so great I did not even pay attention to the quality of the Mike .

    • @larryscott3982
      @larryscott3982 ปีที่แล้ว

      @@Lagrange1970
      And he acknowledged getting a BETTER mic.